Beginer coding

Hello, c++ community!

I am struggling as a new beginner in programming studies. Since I started from "0" in September till now, I would like get some help.

I have a task to create a console program to get a result from entering X. i have some indications for three formulas:

F1(x) = 1/x2
F2(x) sin(x+1)
F3(x) In x

Condition 1 x<=-2
Condition 2 -2<x<=2

Any suggestions how to properly create this program?
Surely you know how to do something, so show us what you can do...
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